/* SPU target-dependent code for GDB, the GNU debugger.
- Copyright (C) 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+ Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011
+ Free Software Foundation, Inc.
Contributed by Ulrich Weigand <uweigand@de.ibm.com>.
Based on a port by Sid Manning <sid@us.ibm.com>.
#include "regcache.h"
#include "reggroups.h"
#include "floatformat.h"
+#include "block.h"
#include "observer.h"
+#include "infcall.h"
#include "spu-tdep.h"
+/* The list of available "set spu " and "show spu " commands. */
+static struct cmd_list_element *setspucmdlist = NULL;
+static struct cmd_list_element *showspucmdlist = NULL;
+
+/* Whether to stop for new SPE contexts. */
+static int spu_stop_on_load_p = 0;
+/* Whether to automatically flush the SW-managed cache. */
+static int spu_auto_flush_cache_p = 1;
+
+
/* The tdep structure. */
struct gdbarch_tdep
{
+ /* The spufs ID identifying our address space. */
+ int id;
+
/* SPU-specific vector type. */
struct type *spu_builtin_type_vec128;
};
return builtin_type (gdbarch)->builtin_uint32;
default:
- internal_error (__FILE__, __LINE__, "invalid regnum");
+ internal_error (__FILE__, __LINE__, _("invalid regnum"));
}
}
return default_register_reggroup_p (gdbarch, regnum, group);
}
-/* Address conversion. */
+
+/* Address handling. */
+
+static int
+spu_gdbarch_id (struct gdbarch *gdbarch)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ int id = tdep->id;
+
+ /* The objfile architecture of a standalone SPU executable does not
+ provide an SPU ID. Retrieve it from the the objfile's relocated
+ address range in this special case. */
+ if (id == -1
+ && symfile_objfile && symfile_objfile->obfd
+ && bfd_get_arch (symfile_objfile->obfd) == bfd_arch_spu
+ && symfile_objfile->sections != symfile_objfile->sections_end)
+ id = SPUADDR_SPU (obj_section_addr (symfile_objfile->sections));
+
+ return id;
+}
+
+static int
+spu_address_class_type_flags (int byte_size, int dwarf2_addr_class)
+{
+ if (dwarf2_addr_class == 1)
+ return TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1;
+ else
+ return 0;
+}
+
+static const char *
+spu_address_class_type_flags_to_name (struct gdbarch *gdbarch, int type_flags)
+{
+ if (type_flags & TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1)
+ return "__ea";
+ else
+ return NULL;
+}
+
+static int
+spu_address_class_name_to_type_flags (struct gdbarch *gdbarch,
+ const char *name, int *type_flags_ptr)
+{
+ if (strcmp (name, "__ea") == 0)
+ {
+ *type_flags_ptr = TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1;
+ return 1;
+ }
+ else
+ return 0;
+}
+
+static void
+spu_address_to_pointer (struct gdbarch *gdbarch,
+ struct type *type, gdb_byte *buf, CORE_ADDR addr)
+{
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ store_unsigned_integer (buf, TYPE_LENGTH (type), byte_order,
+ SPUADDR_ADDR (addr));
+}
static CORE_ADDR
spu_pointer_to_address (struct gdbarch *gdbarch,
struct type *type, const gdb_byte *buf)
{
+ int id = spu_gdbarch_id (gdbarch);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
ULONGEST addr
= extract_unsigned_integer (buf, TYPE_LENGTH (type), byte_order);
- ULONGEST lslr = SPU_LS_SIZE - 1; /* Hard-wired LS size. */
- if (target_has_registers && target_has_stack && target_has_memory)
- lslr = get_frame_register_unsigned (get_selected_frame (NULL),
- SPU_LSLR_REGNUM);
+ /* Do not convert __ea pointers. */
+ if (TYPE_ADDRESS_CLASS_1 (type))
+ return addr;
- return addr & lslr;
+ return addr? SPUADDR (id, addr) : 0;
}
static CORE_ADDR
spu_integer_to_address (struct gdbarch *gdbarch,
struct type *type, const gdb_byte *buf)
{
+ int id = spu_gdbarch_id (gdbarch);
ULONGEST addr = unpack_long (type, buf);
- ULONGEST lslr = SPU_LS_SIZE - 1; /* Hard-wired LS size. */
- if (target_has_registers && target_has_stack && target_has_memory)
- lslr = get_frame_register_unsigned (get_selected_frame (NULL),
- SPU_LSLR_REGNUM);
-
- return addr & lslr;
+ return SPUADDR (id, addr);
}
int found_sp = 0;
int found_fp = 0;
int found_lr = 0;
+ int found_bc = 0;
int reg_immed[SPU_NUM_GPRS];
gdb_byte buf[16];
CORE_ADDR prolog_pc = start_pc;
- The first instruction to set up the stack pointer.
- The first instruction to set up the frame pointer.
- The first instruction to save the link register.
+ - The first instruction to save the backchain.
- We return the instruction after the latest of these three,
+ We return the instruction after the latest of these four,
or the incoming PC if none is found. The first instruction
to set up the stack pointer also defines the frame size.
found_lr = 1;
prolog_pc = pc + 4;
}
+
+ if (ra == SPU_RAW_SP_REGNUM
+ && (found_sp? immed == 0 : rt == SPU_RAW_SP_REGNUM)
+ && !found_bc)
+ {
+ found_bc = 1;
+ prolog_pc = pc + 4;
+ }
}
/* _start uses SELB to set up the stack pointer. */
}
else
{
- /* ??? We don't really know ... */
+ /* ??? We don't really know ... */
*reg = SPU_SP_REGNUM;
*offset = 0;
}
void **this_prologue_cache)
{
struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
struct spu_unwind_cache *info;
struct spu_prologue_data data;
+ CORE_ADDR id = tdep->id;
gdb_byte buf[16];
if (*this_prologue_cache)
/* Determine CFA via unwound CFA_REG plus CFA_OFFSET. */
get_frame_register (this_frame, data.cfa_reg, buf);
cfa = extract_unsigned_integer (buf, 4, byte_order) + data.cfa_offset;
+ cfa = SPUADDR (id, cfa);
/* Call-saved register slots. */
for (i = 0; i < SPU_NUM_GPRS; i++)
{
CORE_ADDR reg;
LONGEST backchain;
+ ULONGEST lslr;
int status;
+ /* Get local store limit. */
+ lslr = get_frame_register_unsigned (this_frame, SPU_LSLR_REGNUM);
+ if (!lslr)
+ lslr = (ULONGEST) -1;
+
/* Get the backchain. */
reg = get_frame_register_unsigned (this_frame, SPU_SP_REGNUM);
- status = safe_read_memory_integer (reg, 4, byte_order, &backchain);
+ status = safe_read_memory_integer (SPUADDR (id, reg), 4, byte_order,
+ &backchain);
/* A zero backchain terminates the frame chain. Also, sanity
check against the local store size limit. */
- if (status && backchain > 0 && backchain < SPU_LS_SIZE)
+ if (status && backchain > 0 && backchain <= lslr)
{
/* Assume the link register is saved into its slot. */
- if (backchain + 16 < SPU_LS_SIZE)
- info->saved_regs[SPU_LR_REGNUM].addr = backchain + 16;
+ if (backchain + 16 <= lslr)
+ info->saved_regs[SPU_LR_REGNUM].addr = SPUADDR (id,
+ backchain + 16);
/* Frame bases. */
- info->frame_base = backchain;
- info->local_base = reg;
+ info->frame_base = SPUADDR (id, backchain);
+ info->local_base = SPUADDR (id, reg);
}
}
return info;
/* The previous SP is equal to the CFA. */
- trad_frame_set_value (info->saved_regs, SPU_SP_REGNUM, info->frame_base);
+ trad_frame_set_value (info->saved_regs, SPU_SP_REGNUM,
+ SPUADDR_ADDR (info->frame_base));
/* Read full contents of the unwound link register in order to
be able to determine the return address. */
static CORE_ADDR
spu_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
CORE_ADDR pc = frame_unwind_register_unsigned (next_frame, SPU_PC_REGNUM);
/* Mask off interrupt enable bit. */
- return pc & -4;
+ return SPUADDR (tdep->id, pc & -4);
}
static CORE_ADDR
spu_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)
{
- return frame_unwind_register_unsigned (next_frame, SPU_SP_REGNUM);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ CORE_ADDR sp = frame_unwind_register_unsigned (next_frame, SPU_SP_REGNUM);
+ return SPUADDR (tdep->id, sp);
}
static CORE_ADDR
spu_read_pc (struct regcache *regcache)
{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (regcache));
ULONGEST pc;
regcache_cooked_read_unsigned (regcache, SPU_PC_REGNUM, &pc);
/* Mask off interrupt enable bit. */
- return pc & -4;
+ return SPUADDR (tdep->id, pc & -4);
}
static void
ULONGEST old_pc;
regcache_cooked_read_unsigned (regcache, SPU_PC_REGNUM, &old_pc);
regcache_cooked_write_unsigned (regcache, SPU_PC_REGNUM,
- (pc & -4) | (old_pc & 3));
+ (SPUADDR_ADDR (pc) & -4) | (old_pc & 3));
+}
+
+
+/* Cell/B.E. cross-architecture unwinder support. */
+
+struct spu2ppu_cache
+{
+ struct frame_id frame_id;
+ struct regcache *regcache;
+};
+
+static struct gdbarch *
+spu2ppu_prev_arch (struct frame_info *this_frame, void **this_cache)
+{
+ struct spu2ppu_cache *cache = *this_cache;
+ return get_regcache_arch (cache->regcache);
+}
+
+static void
+spu2ppu_this_id (struct frame_info *this_frame,
+ void **this_cache, struct frame_id *this_id)
+{
+ struct spu2ppu_cache *cache = *this_cache;
+ *this_id = cache->frame_id;
}
+static struct value *
+spu2ppu_prev_register (struct frame_info *this_frame,
+ void **this_cache, int regnum)
+{
+ struct spu2ppu_cache *cache = *this_cache;
+ struct gdbarch *gdbarch = get_regcache_arch (cache->regcache);
+ gdb_byte *buf;
+
+ buf = alloca (register_size (gdbarch, regnum));
+ regcache_cooked_read (cache->regcache, regnum, buf);
+ return frame_unwind_got_bytes (this_frame, regnum, buf);
+}
+
+static int
+spu2ppu_sniffer (const struct frame_unwind *self,
+ struct frame_info *this_frame, void **this_prologue_cache)
+{
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ CORE_ADDR base, func, backchain;
+ gdb_byte buf[4];
+
+ if (gdbarch_bfd_arch_info (target_gdbarch)->arch == bfd_arch_spu)
+ return 0;
+
+ base = get_frame_sp (this_frame);
+ func = get_frame_pc (this_frame);
+ if (target_read_memory (base, buf, 4))
+ return 0;
+ backchain = extract_unsigned_integer (buf, 4, byte_order);
+
+ if (!backchain)
+ {
+ struct frame_info *fi;
+
+ struct spu2ppu_cache *cache
+ = FRAME_OBSTACK_CALLOC (1, struct spu2ppu_cache);
+
+ cache->frame_id = frame_id_build (base + 16, func);
+
+ for (fi = get_next_frame (this_frame); fi; fi = get_next_frame (fi))
+ if (gdbarch_bfd_arch_info (get_frame_arch (fi))->arch != bfd_arch_spu)
+ break;
+
+ if (fi)
+ {
+ cache->regcache = frame_save_as_regcache (fi);
+ *this_prologue_cache = cache;
+ return 1;
+ }
+ else
+ {
+ struct regcache *regcache;
+ regcache = get_thread_arch_regcache (inferior_ptid, target_gdbarch);
+ cache->regcache = regcache_dup (regcache);
+ *this_prologue_cache = cache;
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+static void
+spu2ppu_dealloc_cache (struct frame_info *self, void *this_cache)
+{
+ struct spu2ppu_cache *cache = this_cache;
+ regcache_xfree (cache->regcache);
+}
+
+static const struct frame_unwind spu2ppu_unwind = {
+ ARCH_FRAME,
+ spu2ppu_this_id,
+ spu2ppu_prev_register,
+ NULL,
+ spu2ppu_sniffer,
+ spu2ppu_dealloc_cache,
+ spu2ppu_prev_arch,
+};
+
/* Function calling convention. */
/* Set the return address. */
memset (buf, 0, sizeof buf);
- store_unsigned_integer (buf, 4, byte_order, bp_addr);
+ store_unsigned_integer (buf, 4, byte_order, SPUADDR_ADDR (bp_addr));
regcache_cooked_write (regcache, SPU_LR_REGNUM, buf);
/* If STRUCT_RETURN is true, then the struct return address (in
if (struct_return)
{
memset (buf, 0, sizeof buf);
- store_unsigned_integer (buf, 4, byte_order, struct_addr);
+ store_unsigned_integer (buf, 4, byte_order, SPUADDR_ADDR (struct_addr));
regcache_cooked_write (regcache, regnum++, buf);
}
static struct frame_id
spu_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
CORE_ADDR pc = get_frame_register_unsigned (this_frame, SPU_PC_REGNUM);
CORE_ADDR sp = get_frame_register_unsigned (this_frame, SPU_SP_REGNUM);
- return frame_id_build (sp, pc & -4);
+ return frame_id_build (SPUADDR (tdep->id, sp), SPUADDR (tdep->id, pc & -4));
}
/* Function return value access. */
break;
case RETURN_VALUE_STRUCT_CONVENTION:
- error ("Cannot set function return value.");
+ error (_("Cannot set function return value."));
break;
}
}
break;
case RETURN_VALUE_STRUCT_CONVENTION:
- error ("Function return value unknown.");
+ error (_("Function return value unknown."));
break;
}
}
/* Breakpoints. */
static const gdb_byte *
-spu_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR * pcptr, int *lenptr)
+spu_breakpoint_from_pc (struct gdbarch *gdbarch,
+ CORE_ADDR * pcptr, int *lenptr)
{
static const gdb_byte breakpoint[] = { 0x00, 0x00, 0x3f, 0xff };
return breakpoint;
}
+static int
+spu_memory_remove_breakpoint (struct gdbarch *gdbarch,
+ struct bp_target_info *bp_tgt)
+{
+ /* We work around a problem in combined Cell/B.E. debugging here. Consider
+ that in a combined application, we have some breakpoints inserted in SPU
+ code, and now the application forks (on the PPU side). GDB common code
+ will assume that the fork system call copied all breakpoints into the new
+ process' address space, and that all those copies now need to be removed
+ (see breakpoint.c:detach_breakpoints).
+
+ While this is certainly true for PPU side breakpoints, it is not true
+ for SPU side breakpoints. fork will clone the SPU context file
+ descriptors, so that all the existing SPU contexts are in accessible
+ in the new process. However, the contents of the SPU contexts themselves
+ are *not* cloned. Therefore the effect of detach_breakpoints is to
+ remove SPU breakpoints from the *original* SPU context's local store
+ -- this is not the correct behaviour.
+
+ The workaround is to check whether the PID we are asked to remove this
+ breakpoint from (i.e. ptid_get_pid (inferior_ptid)) is different from the
+ PID of the current inferior (i.e. current_inferior ()->pid). This is only
+ true in the context of detach_breakpoints. If so, we simply do nothing.
+ [ Note that for the fork child process, it does not matter if breakpoints
+ remain inserted, because those SPU contexts are not runnable anyway --
+ the Linux kernel allows only the original process to invoke spu_run. */
+
+ if (ptid_get_pid (inferior_ptid) != current_inferior ()->pid)
+ return 0;
+
+ return default_memory_remove_breakpoint (gdbarch, bp_tgt);
+}
+
/* Software single-stepping support. */
spu_software_single_step (struct frame_info *frame)
{
struct gdbarch *gdbarch = get_frame_arch (frame);
+ struct address_space *aspace = get_frame_address_space (frame);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
CORE_ADDR pc, next_pc;
unsigned int insn;
int offset, reg;
gdb_byte buf[4];
+ ULONGEST lslr;
pc = get_frame_pc (frame);
return 1;
insn = extract_unsigned_integer (buf, 4, byte_order);
+ /* Get local store limit. */
+ lslr = get_frame_register_unsigned (frame, SPU_LSLR_REGNUM);
+ if (!lslr)
+ lslr = (ULONGEST) -1;
+
/* Next sequential instruction is at PC + 4, except if the current
instruction is a PPE-assisted call, in which case it is at PC + 8.
Wrap around LS limit to be on the safe side. */
if ((insn & 0xffffff00) == 0x00002100)
- next_pc = (pc + 8) & (SPU_LS_SIZE - 1);
+ next_pc = (SPUADDR_ADDR (pc) + 8) & lslr;
else
- next_pc = (pc + 4) & (SPU_LS_SIZE - 1);
+ next_pc = (SPUADDR_ADDR (pc) + 4) & lslr;
- insert_single_step_breakpoint (gdbarch, next_pc);
+ insert_single_step_breakpoint (gdbarch,
+ aspace, SPUADDR (SPUADDR_SPU (pc), next_pc));
if (is_branch (insn, &offset, ®))
{
CORE_ADDR target = offset;
if (reg == SPU_PC_REGNUM)
- target += pc;
+ target += SPUADDR_ADDR (pc);
else if (reg != -1)
{
get_frame_register_bytes (frame, reg, 0, 4, buf);
target += extract_unsigned_integer (buf, 4, byte_order) & -4;
}
- target = target & (SPU_LS_SIZE - 1);
+ target = target & lslr;
if (target != next_pc)
- insert_single_step_breakpoint (gdbarch, target);
+ insert_single_step_breakpoint (gdbarch, aspace,
+ SPUADDR (SPUADDR_SPU (pc), target));
}
return 1;
spu_get_longjmp_target (struct frame_info *frame, CORE_ADDR *pc)
{
struct gdbarch *gdbarch = get_frame_arch (frame);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
gdb_byte buf[4];
CORE_ADDR jb_addr;
/* Jump buffer is pointed to by the argument register $r3. */
get_frame_register_bytes (frame, SPU_ARG1_REGNUM, 0, 4, buf);
jb_addr = extract_unsigned_integer (buf, 4, byte_order);
- if (target_read_memory (jb_addr, buf, 4))
+ if (target_read_memory (SPUADDR (tdep->id, jb_addr), buf, 4))
return 0;
*pc = extract_unsigned_integer (buf, 4, byte_order);
+ *pc = SPUADDR (tdep->id, *pc);
return 1;
}
+/* Disassembler. */
+
+struct spu_dis_asm_data
+{
+ struct gdbarch *gdbarch;
+ int id;
+};
+
+static void
+spu_dis_asm_print_address (bfd_vma addr, struct disassemble_info *info)
+{
+ struct spu_dis_asm_data *data = info->application_data;
+ print_address (data->gdbarch, SPUADDR (data->id, addr), info->stream);
+}
+
+static int
+gdb_print_insn_spu (bfd_vma memaddr, struct disassemble_info *info)
+{
+ /* The opcodes disassembler does 18-bit address arithmetic. Make
+ sure the SPU ID encoded in the high bits is added back when we
+ call print_address. */
+ struct disassemble_info spu_info = *info;
+ struct spu_dis_asm_data data;
+ data.gdbarch = info->application_data;
+ data.id = SPUADDR_SPU (memaddr);
+
+ spu_info.application_data = &data;
+ spu_info.print_address_func = spu_dis_asm_print_address;
+ return print_insn_spu (memaddr, &spu_info);
+}
+
+
/* Target overlays for the SPU overlay manager.
See the documentation of simple_overlay_update for how the
_ovly_table should never change.
- Both tables are aligned to a 16-byte boundary, the symbols _ovly_table
- and _ovly_buf_table are of type STT_OBJECT and their size set to the size
- of the respective array. buf in _ovly_table is an index into _ovly_buf_table.
+ Both tables are aligned to a 16-byte boundary, the symbols
+ _ovly_table and _ovly_buf_table are of type STT_OBJECT and their
+ size set to the size of the respective array. buf in _ovly_table is
+ an index into _ovly_buf_table.
- mapped is an index into _ovly_table. Both the mapped and buf indices start
+ mapped is an index into _ovly_table. Both the mapped and buf indices start
from one to reference the first entry in their respective tables. */
/* Using the per-objfile private data mechanism, we store for each
if (!ovly_table_msym)
return NULL;
- ovly_buf_table_msym = lookup_minimal_symbol ("_ovly_buf_table", NULL, objfile);
+ ovly_buf_table_msym = lookup_minimal_symbol ("_ovly_buf_table",
+ NULL, objfile);
if (!ovly_buf_table_msym)
return NULL;
enum bfd_endian byte_order = bfd_big_endian (osect->objfile->obfd)?
BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE;
struct spu_overlay_table *ovly_table;
- CORE_ADDR val;
+ CORE_ADDR id, val;
ovly_table = spu_get_overlay_table (osect->objfile);
if (!ovly_table)
if (ovly_table->mapped_ptr == 0)
return;
- val = read_memory_unsigned_integer (ovly_table->mapped_ptr, 4, byte_order);
+ id = SPUADDR_SPU (obj_section_addr (osect));
+ val = read_memory_unsigned_integer (SPUADDR (id, ovly_table->mapped_ptr),
+ 4, byte_order);
osect->ovly_mapped = (val == ovly_table->mapped_val);
}
/* Whenever a new objfile is loaded, read the target's _ovly_table.
If there is one, go through all sections and make sure for non-
overlay sections LMA equals VMA, while for overlay sections LMA
- is larger than local store size. */
+ is larger than SPU_OVERLAY_LMA. */
static void
spu_overlay_new_objfile (struct objfile *objfile)
{
if (ovly_table[ndx].mapped_ptr == 0)
bfd_section_lma (obfd, bsect) = bfd_section_vma (obfd, bsect);
else
- bfd_section_lma (obfd, bsect) = bsect->filepos + SPU_LS_SIZE;
+ bfd_section_lma (obfd, bsect) = SPU_OVERLAY_LMA + bsect->filepos;
+ }
+}
+
+
+/* Insert temporary breakpoint on "main" function of newly loaded
+ SPE context OBJFILE. */
+static void
+spu_catch_start (struct objfile *objfile)
+{
+ struct minimal_symbol *minsym;
+ struct symtab *symtab;
+ CORE_ADDR pc;
+ char buf[32];
+
+ /* Do this only if requested by "set spu stop-on-load on". */
+ if (!spu_stop_on_load_p)
+ return;
+
+ /* Consider only SPU objfiles. */
+ if (!objfile || bfd_get_arch (objfile->obfd) != bfd_arch_spu)
+ return;
+
+ /* The main objfile is handled differently. */
+ if (objfile == symfile_objfile)
+ return;
+
+ /* There can be multiple symbols named "main". Search for the
+ "main" in *this* objfile. */
+ minsym = lookup_minimal_symbol ("main", NULL, objfile);
+ if (!minsym)
+ return;
+
+ /* If we have debugging information, try to use it -- this
+ will allow us to properly skip the prologue. */
+ pc = SYMBOL_VALUE_ADDRESS (minsym);
+ symtab = find_pc_sect_symtab (pc, SYMBOL_OBJ_SECTION (minsym));
+ if (symtab != NULL)
+ {
+ struct blockvector *bv = BLOCKVECTOR (symtab);
+ struct block *block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
+ struct symbol *sym;
+ struct symtab_and_line sal;
+
+ sym = lookup_block_symbol (block, "main", VAR_DOMAIN);
+ if (sym)
+ {
+ fixup_symbol_section (sym, objfile);
+ sal = find_function_start_sal (sym, 1);
+ pc = sal.pc;
+ }
+ }
+
+ /* Use a numerical address for the set_breakpoint command to avoid having
+ the breakpoint re-set incorrectly. */
+ xsnprintf (buf, sizeof buf, "*%s", core_addr_to_string (pc));
+ create_breakpoint (get_objfile_arch (objfile), buf /* arg */,
+ NULL /* cond_string */, -1 /* thread */,
+ 0 /* parse_condition_and_thread */, 1 /* tempflag */,
+ bp_breakpoint /* type_wanted */,
+ 0 /* ignore_count */,
+ AUTO_BOOLEAN_FALSE /* pending_break_support */,
+ NULL /* ops */, 0 /* from_tty */, 1 /* enabled */,
+ 0 /* internal */);
+}
+
+
+/* Look up OBJFILE loaded into FRAME's SPU context. */
+static struct objfile *
+spu_objfile_from_frame (struct frame_info *frame)
+{
+ struct gdbarch *gdbarch = get_frame_arch (frame);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ struct objfile *obj;
+
+ if (gdbarch_bfd_arch_info (gdbarch)->arch != bfd_arch_spu)
+ return NULL;
+
+ ALL_OBJFILES (obj)
+ {
+ if (obj->sections != obj->sections_end
+ && SPUADDR_SPU (obj_section_addr (obj->sections)) == tdep->id)
+ return obj;
}
+
+ return NULL;
+}
+
+/* Flush cache for ea pointer access if available. */
+static void
+flush_ea_cache (void)
+{
+ struct minimal_symbol *msymbol;
+ struct objfile *obj;
+
+ if (!has_stack_frames ())
+ return;
+
+ obj = spu_objfile_from_frame (get_current_frame ());
+ if (obj == NULL)
+ return;
+
+ /* Lookup inferior function __cache_flush. */
+ msymbol = lookup_minimal_symbol ("__cache_flush", NULL, obj);
+ if (msymbol != NULL)
+ {
+ struct type *type;
+ CORE_ADDR addr;
+
+ type = objfile_type (obj)->builtin_void;
+ type = lookup_function_type (type);
+ type = lookup_pointer_type (type);
+ addr = SYMBOL_VALUE_ADDRESS (msymbol);
+
+ call_function_by_hand (value_from_pointer (type, addr), 0, NULL);
+ }
+}
+
+/* This handler is called when the inferior has stopped. If it is stopped in
+ SPU architecture then flush the ea cache if used. */
+static void
+spu_attach_normal_stop (struct bpstats *bs, int print_frame)
+{
+ if (!spu_auto_flush_cache_p)
+ return;
+
+ /* Temporarily reset spu_auto_flush_cache_p to avoid recursively
+ re-entering this function when __cache_flush stops. */
+ spu_auto_flush_cache_p = 0;
+ flush_ea_cache ();
+ spu_auto_flush_cache_p = 1;
}
static void
info_spu_command (char *args, int from_tty)
{
- printf_unfiltered (_("\"info spu\" must be followed by the name of an SPU facility.\n"));
+ printf_unfiltered (_("\"info spu\" must be followed by "
+ "the name of an SPU facility.\n"));
help_list (infospucmdlist, "info spu ", -1, gdb_stdout);
}
+/* Root of all "set spu "/"show spu " commands. */
+
+static void
+show_spu_command (char *args, int from_tty)
+{
+ help_list (showspucmdlist, "show spu ", all_commands, gdb_stdout);
+}
+
+static void
+set_spu_command (char *args, int from_tty)
+{
+ help_list (setspucmdlist, "set spu ", all_commands, gdb_stdout);
+}
+
+static void
+show_spu_stop_on_load (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c, const char *value)
+{
+ fprintf_filtered (file, _("Stopping for new SPE threads is %s.\n"),
+ value);
+}
+
+static void
+show_spu_auto_flush_cache (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c, const char *value)
+{
+ fprintf_filtered (file, _("Automatic software-cache flush is %s.\n"),
+ value);
+}
+
+
/* Set up gdbarch struct. */
static struct gdbarch *
{
struct gdbarch *gdbarch;
struct gdbarch_tdep *tdep;
+ int id = -1;
+
+ /* Which spufs ID was requested as address space? */
+ if (info.tdep_info)
+ id = *(int *)info.tdep_info;
+ /* For objfile architectures of SPU solibs, decode the ID from the name.
+ This assumes the filename convention employed by solib-spu.c. */
+ else if (info.abfd)
+ {
+ char *name = strrchr (info.abfd->filename, '@');
+ if (name)
+ sscanf (name, "@0x%*x <%d>", &id);
+ }
- /* Find a candidate among the list of pre-declared architectures. */
- arches = gdbarch_list_lookup_by_info (arches, &info);
- if (arches != NULL)
- return arches->gdbarch;
-
- /* Is is for us? */
- if (info.bfd_arch_info->mach != bfd_mach_spu)
- return NULL;
+ /* Find a candidate among extant architectures. */
+ for (arches = gdbarch_list_lookup_by_info (arches, &info);
+ arches != NULL;
+ arches = gdbarch_list_lookup_by_info (arches->next, &info))
+ {
+ tdep = gdbarch_tdep (arches->gdbarch);
+ if (tdep && tdep->id == id)
+ return arches->gdbarch;
+ }
- /* Yes, create a new architecture. */
+ /* None found, so create a new architecture. */
tdep = XCALLOC (1, struct gdbarch_tdep);
+ tdep->id = id;
gdbarch = gdbarch_alloc (&info, tdep);
/* Disassembler. */
- set_gdbarch_print_insn (gdbarch, print_insn_spu);
+ set_gdbarch_print_insn (gdbarch, gdb_print_insn_spu);
/* Registers. */
set_gdbarch_num_regs (gdbarch, SPU_NUM_REGS);
set_gdbarch_double_format (gdbarch, floatformats_ieee_double);
set_gdbarch_long_double_format (gdbarch, floatformats_ieee_double);
- /* Address conversion. */
+ /* Address handling. */
+ set_gdbarch_address_to_pointer (gdbarch, spu_address_to_pointer);
set_gdbarch_pointer_to_address (gdbarch, spu_pointer_to_address);
set_gdbarch_integer_to_address (gdbarch, spu_integer_to_address);
+ set_gdbarch_address_class_type_flags (gdbarch, spu_address_class_type_flags);
+ set_gdbarch_address_class_type_flags_to_name
+ (gdbarch, spu_address_class_type_flags_to_name);
+ set_gdbarch_address_class_name_to_type_flags
+ (gdbarch, spu_address_class_name_to_type_flags);
+
/* Inferior function calls. */
set_gdbarch_call_dummy_location (gdbarch, ON_STACK);
set_gdbarch_skip_prologue (gdbarch, spu_skip_prologue);
set_gdbarch_in_function_epilogue_p (gdbarch, spu_in_function_epilogue_p);
+ /* Cell/B.E. cross-architecture unwinder support. */
+ frame_unwind_prepend_unwinder (gdbarch, &spu2ppu_unwind);
+
/* Breakpoints. */
set_gdbarch_decr_pc_after_break (gdbarch, 4);
set_gdbarch_breakpoint_from_pc (gdbarch, spu_breakpoint_from_pc);
+ set_gdbarch_memory_remove_breakpoint (gdbarch, spu_memory_remove_breakpoint);
set_gdbarch_cannot_step_breakpoint (gdbarch, 1);
set_gdbarch_software_single_step (gdbarch, spu_software_single_step);
set_gdbarch_get_longjmp_target (gdbarch, spu_get_longjmp_target);
observer_attach_new_objfile (spu_overlay_new_objfile);
spu_overlay_data = register_objfile_data ();
+ /* Install spu stop-on-load handler. */
+ observer_attach_new_objfile (spu_catch_start);
+
+ /* Add ourselves to normal_stop event chain. */
+ observer_attach_normal_stop (spu_attach_normal_stop);
+
+ /* Add root prefix command for all "set spu"/"show spu" commands. */
+ add_prefix_cmd ("spu", no_class, set_spu_command,
+ _("Various SPU specific commands."),
+ &setspucmdlist, "set spu ", 0, &setlist);
+ add_prefix_cmd ("spu", no_class, show_spu_command,
+ _("Various SPU specific commands."),
+ &showspucmdlist, "show spu ", 0, &showlist);
+
+ /* Toggle whether or not to add a temporary breakpoint at the "main"
+ function of new SPE contexts. */
+ add_setshow_boolean_cmd ("stop-on-load", class_support,
+ &spu_stop_on_load_p, _("\
+Set whether to stop for new SPE threads."),
+ _("\
+Show whether to stop for new SPE threads."),
+ _("\
+Use \"on\" to give control to the user when a new SPE thread\n\
+enters its \"main\" function.\n\
+Use \"off\" to disable stopping for new SPE threads."),
+ NULL,
+ show_spu_stop_on_load,
+ &setspucmdlist, &showspucmdlist);
+
+ /* Toggle whether or not to automatically flush the software-managed
+ cache whenever SPE execution stops. */
+ add_setshow_boolean_cmd ("auto-flush-cache", class_support,
+ &spu_auto_flush_cache_p, _("\
+Set whether to automatically flush the software-managed cache."),
+ _("\
+Show whether to automatically flush the software-managed cache."),
+ _("\
+Use \"on\" to automatically flush the software-managed cache\n\
+whenever SPE execution stops.\n\
+Use \"off\" to never automatically flush the software-managed cache."),
+ NULL,
+ show_spu_auto_flush_cache,
+ &setspucmdlist, &showspucmdlist);
+
/* Add root prefix command for all "info spu" commands. */
add_prefix_cmd ("spu", class_info, info_spu_command,
_("Various SPU specific commands."),
projects / deliverable / binutils-gdb.git / blobdiff